and now... ring gap.

 also posted over at GasGas rider.org

Hi there,

I'm ready to assemble my 2001 xc300 top end. I have my cylinder just
back from being replated by Langcourt's. They did a nice job. I have
an Athena A size piston kit. I sent the piston, but not the rings,
with the cylinder to Langcourt.

If I drop a ring into the bore to check ring gap, I am seeing about .
014 or.015 inch ring gap (.36 or .38 mm). That looks pretty tight to
my untrained eye, and I don't have a gap spec to check against.

I just wonder if I'll run out of gap when the engine gets hot.

Thanks in advance for a clue or two.

-Dean

 
Sort of a Murphy's law kind of response from Athena. Never provide
extra information when asking a question.

"The difference 0.01 to 0.03mm (0.35 →.38 )in the ring end gap of t=
he
rings doesn’t affect the performance of the engine.

The clearance piston-cylinder wall that we use is from 0.04 to 0.06mm

Thank you"

 Dean,
  You have plenty of end gap for the rings to expand. Not too tight at
all.

Jim
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Thank you, Jim.